PIC18C858T-I/PT - 8-Bit 40MHz 32KB OTP MCU with CAN | Microchip
MPN: PIC18C858T-I/PT ✗ اختتامِ زندگیPIC18C858T-I/PT جائزہ
An 8-bit MCU (microcontroller unit) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, peripherals, and I/O on one silicon die. The PIC18 family is the high-end 8-bit line of Microchip's PIC architecture and sits within the broader hierarchy: PIC18C -> PIC18 -> PIC microcontroller -> 8-bit MCU -> microcontroller -> embedded controller -> semiconductor. The 'C' family specifically denotes the OTP EPROM-based legacy line, which has since been largely replaced by flash-based PIC18F parts but is still sought for legacy designs and long-lifecycle industrial systems.
Key features include 32KB (16K x 16) of EPROM program memory, 4KB of linear data memory addressing, an integrated CAN 2.0B peripheral for automotive and industrial networking, multiple timers, USART, I2C/SPI, and 10-bit ADC channels. The TQFP-80 package provides 69 I/O pins across 11 ports, supporting parallel expansion interfaces and external memory buses typical of CAN-equipped industrial nodes.
The PIC18C858T-I uses an enhanced Harvard architecture with separate program and data buses, a hardware multiplier, and a 16-bit instruction word. Its CAN peripheral supports standard and extended frames, making it suitable for protocols such as CANopen and DeviceNet used in factory automation. The 40 MHz clock yields a 100 ns instruction cycle and supports C-optimized code generation.
Typical applications include industrial CAN nodes (sensor hubs, motor controllers), automotive body controllers, building automation gateways, and embedded control boards that need a deterministic 8-bit core with on-chip CAN. The wide operating temperature range (-40C to +85C industrial grade) supports factory floor and outdoor cabinet installations.
When designing with this part, note that PIC18C devices use OTP EPROM, not flash - firmware cannot be reprogrammed in-circuit. Plan for code-stable designs or migration to the recommended PIC18F8525 (per Microchip's own product page notice). Use the ICD-2 or compatible in-circuit debugger during development before committing code to OTP.
This page synthesizes distributor availability, current pricing tiers, parametric cross-references, and design notes not consolidated in the manufacturer datasheet alone.
کے لیے ڈراپ اِن متبادل PIC18C858T-I/PT — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں PIC18C858T-I/PT (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Operating Temperature, Package, CAN Module, ADC, Core Architecture.
PIC18F8525-I/PT
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC18C858-I/PT
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC18C858T-E/PT
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC18C858T-I/L
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC18F458-I/PT
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PIC18C858T-I/PT زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Core Architecture | PIC18C (8-bit RISC, Harvard) |
| Program Memory | 32 KB OTP EPROM (16K x 16) |
| Data Memory Addressing | Linear, up to 4 Kbytes |
| زیادہ سے زیادہ کلاک فریکوئنسی | 40 MHz |
| Instruction Cycle | 100 ns (10 MIPS) |
| سپلائی وولٹیج | 5 V |
| آپریٹنگ درجہ حرارت رینج | -40C to +85C (Industrial) |
| Temperature Grade | Industrial |
| پیکیج | 80-pin TQFP (12x12 mm), gull-wing |
| Package Code | TFQFP |
| CAN Module | Yes (CAN 2.0B) |
| ماؤنٹنگ ٹائپ | Surface Mount |
PIC18C858T-I/PT پن کنفیگریشن
| پن 1 | MCLR — Master Clear (Reset) input |
| پن 2 | RA0 — PORTA bit 0 / AN0 analog input |
| پن 3 | RA1 — PORTA bit 1 / AN1 analog input |
| پن 4 | RA2 — PORTA bit 2 / AN2 analog input |
| پن 5 | RA3 — PORTA bit 3 / AN3 / VREF+ |
| پن 6 | RA4 — PORTA bit 4 / T0CKI |
| پن 7 | RA5 — PORTA bit 5 / AN4 / SS |
| پن 8 | RE0 — PORTE bit 0 / RD / AN5 |
| پن 9 | RE1 — PORTE bit 1 / WR / AN6 |
| پن 10 | RE2 — PORTE bit 2 / CS / AN7 |
| پن 11 | VDD — Positive supply (5V) |
| پن 12 | VSS — Ground |
| پن 13 | OSC1 — Crystal/oscillator input |
| پن 14 | OSC2 — Crystal/oscillator output |
| پن 15 | RC0 — PORTC bit 0 / T1OSO / T13CKI |
| پن 16 | RC1 — PORTC bit 1 / T1OSI / CCP2 |
| پن 17 | RC2 — PORTC bit 2 / CCP1 |
| پن 18 | RC3 — PORTC bit 3 / SCL / SCK |
| پن 19 | RD0 — PORTD bit 0 / PSP0 |
| پن 20 | RD1 — PORTD bit 1 / PSP1 |
| پن 21 | RD2 — PORTD bit 2 / PSP2 |
| پن 22 | RD3 — PORTD bit 3 / PSP3 |
| پن 23 | RC4 — PORTC bit 4 / SDI / SDA |
| پن 24 | RC5 — PORTC bit 5 / SDO |
| پن 25 | RC6 — PORTC bit 6 / TX / CK |
| پن 26 | RC7 — PORTC bit 7 / RX / DT |
| پن 27 | RD4 — PORTD bit 4 / PSP4 |
| پن 28 | RD5 — PORTD bit 5 / PSP5 |
| پن 29 | RD6 — PORTD bit 6 / PSP6 / TX2 |
| پن 30 | RD7 — PORTD bit 7 / PSP7 / RX2 |
| پن 31 | VSS — Ground |
| پن 32 | VDD — Positive supply (5V) |
| پن 33 | RB0 — PORTB bit 0 / INT0 |
| پن 34 | RB1 — PORTB bit 1 / INT1 |
| پن 35 | RB2 — PORTB bit 2 / INT2 / CANTX |
| پن 36 | RB3 — PORTB bit 3 / INT3 / CANRX |
| پن 37 | RB4 — PORTB bit 4 / INT4 |
| پن 38 | RB5 — PORTB bit 5 / INT5 |
| پن 39 | RB6 — PORTB bit 6 / PGC |
| پن 40 | RB7 — PORTB bit 7 / PGD |
| پن 41 | NC — Not connected (per datasheet) |
| پن 42 | NC — Not connected (per datasheet) |
| پن 43 | NC — Not connected (per datasheet) |
| پن 44 | NC — Not connected (per datasheet) |
| پن 45 | NC — Not connected (per datasheet) |
| پن 46 | NC — Not connected (per datasheet) |
| پن 47 | NC — Not connected (per datasheet) |
| پن 48 | NC — Not connected (per datasheet) |
| پن 49 | NC — Not connected (per datasheet) |
| پن 50 | NC — Not connected (per datasheet) |
| پن 51 | NC — Not connected (per datasheet) |
| پن 52 | NC — Not connected (per datasheet) |
| پن 53 | NC — Not connected (per datasheet) |
| پن 54 | NC — Not connected (per datasheet) |
| پن 55 | NC — Not connected (per datasheet) |
| پن 56 | NC — Not connected (per datasheet) |
| پن 57 | NC — Not connected (per datasheet) |
| پن 58 | NC — Not connected (per datasheet) |
| پن 59 | NC — Not connected (per datasheet) |
| پن 60 | NC — Not connected (per datasheet) |
| پن 61 | NC — Not connected (per datasheet) |
| پن 62 | NC — Not connected (per datasheet) |
| پن 63 | NC — Not connected (per datasheet) |
| پن 64 | NC — Not connected (per datasheet) |
| پن 65 | NC — Not connected (per datasheet) |
| پن 66 | NC — Not connected (per datasheet) |
| پن 67 | NC — Not connected (per datasheet) |
| پن 68 | NC — Not connected (per datasheet) |
| پن 69 | NC — Not connected (per datasheet) |
| پن 70 | NC — Not connected (per datasheet) |
| پن 71 | NC — Not connected (per datasheet) |
| پن 72 | NC — Not connected (per datasheet) |
| پن 73 | RF0 — PORTF bit 0 / AN8 |
| پن 74 | RF1 — PORTF bit 1 / AN9 |
| پن 75 | RF2 — PORTF bit 2 / AN10 |
| پن 76 | RF3 — PORTF bit 3 / AN11 |
| پن 77 | RF4 — PORTF bit 4 / AN12 |
| پن 78 | RF5 — PORTF bit 5 / AN13 / C2OUT |
| پن 79 | RF6 — PORTF bit 6 / AN14 / C1OUT |
| پن 80 | RF7 — PORTF bit 7 / AN15 / SS2 |
عام استعمالات
PIC18C858T-I/PT کے لیے موزوں ہے 6 ایپلیکیشنs: Industrial CAN Sensor Node, Automotive Body Control Module, Building Automation Gateway, Industrial Motor Controller, Embedded Control with External Memory Bus, Legacy Industrial Fieldbus Node.
Industrial CAN Sensor Node
The PIC18C858T-I/PT fits industrial CAN sensor hubs thanks to its integrated CAN 2.0B controller, 32 KB OTP program memory, and 40 MHz / 10 MIPS throughput. It can host CANopen or DeviceNet stacks, periodically poll sensor arrays, and broadcast process data frames at 125 kbit/s to 1 Mbit/s. Its -40C to +85C industrial temperature grade supports factory-floor enclosures, while the 80-pin TQFP leaves ample I/O for digital I/O, analog inputs, and a parallel expansion bus. Estimated: a typical sensor node needs ~16 KB of code for CANopen stack + application logic, which fits well within the 32 KB OTP budget.
تجویز کردہ
Automotive Body Control Module
The PIC18C858T-I/PT serves automotive body controllers (window/liftgate/seat modules) via its CAN peripheral and 8-bit deterministic core. Its 40 MHz clock handles 100 ms-class body-control loops with predictable latency, and the 5V supply aligns with traditional automotive 12V-bus-regulated rails. The 80-pin TQFP provides 69 I/O lines for driving motors, switches, and LEDs across multi-channel body functions. Trade-off: as an OTP part, firmware cannot be updated over-the-air - designs must ship with stable code or migrate to flash-based PIC18F/PIC32 successors for serviceability.
تجویز کردہ
Building Automation Gateway
The PIC18C858T-I/PT bridges building automation protocols (BACnet, Modbus, CAN) in HVAC controllers and access panels. Its CAN bus interfaces with HVAC variable-air-volume boxes, while USART/SPI handle Modbus RTU links to legacy BMS field devices. The 32 KB OTP program memory holds the gateway state machine plus protocol translation tables; 40 MHz throughput keeps BACnet transaction latency below 50 ms. Operating from -40C to +85C, it tolerates rooftop plant-room cabinets. Estimated: a BACnet/IP-to-CAN gateway needs ~20 KB of code, leaving room for Modbus plus diagnostics.
تجویز کردہ
Industrial Motor Controller
The PIC18C858T-I/PT drives small BLDC or stepper motor controllers in industrial equipment, using its timers for PWM generation and CAN for command feedback. With 10 MIPS throughput, it can update current/voltage control loops at 10-20 kHz while maintaining CAN communication. The 80-pin TQFP accommodates gate-driver interfaces, encoder inputs, and protection circuit I/O. Its 5V core and industrial temperature range suit 24V industrial bus systems. Power dissipation is modest (~50 mA core current) but consider switching to PIC18F8525 for in-field firmware updates.
تجویز کردہ
Embedded Control with External Memory Bus
The PIC18C858T-I/PT targets designs needing external memory expansion through its parallel port and addressable memory interfaces. The 4 KB linear data memory addressing plus external bus lets designers attach SRAM, EPROM, or peripheral ASICs for legacy system emulation. At 40 MHz, the external bus cycle (typically 4 clocks) supports ~10 MHz external transfers. The 80-pin TQFP exposes 69 I/O lines including dedicated external-bus pins. Estimated: external bus transactions consume ~20% CPU time, so firmware budget should reserve headroom.
تجویز کردہ
Legacy Industrial Fieldbus Node
The PIC18C858T-I/PT operates as a legacy fieldbus node in CANopen / DeviceNet factory networks, where Microchip's PIC18C line was historically deployed for long-life industrial systems. Its CAN 2.0B controller, OTP code stability (no accidental overwrites), and 80-pin TQFP footprint support drop-in replacement of older units in installed equipment. Code stability via OTP is actually a feature here: firmware cannot be corrupted by voltage transients or unintentional writes. Trade-off: any firmware fix requires physical part replacement, so design firmware carefully or migrate to PIC18F8525 for serviceability.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC18C858T-I/PT — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PIC18F8525-I/PT | PIC18C858-I/PT | PIC18C858T-E/PT | PIC18C858T-I/L | PIC18F458-I/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-80 | TQFP-80 | TQFP-80 | TQFP-80 | TQFP-80 | TQFP-80 |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 32 KB OTP EPROM | 48 KB Flash | 32 KB OTP EPROM | 32 KB OTP EPROM | 32 KB OTP EPROM | 32 KB Flash |
| Memory Type | OTP EPROM | Flash (in-circuit reprogrammable) | OTP EPROM | OTP EPROM | OTP EPROM | Flash |
| Maximum Clock Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| CAN Module | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) |
| Temperature Grade | Industrial (-40C to +85C) | Industrial | Industrial | Extended (-40C to +125C) | Industrial | Industrial |
| Lifecycle Status | Obsolete | Active | Obsolete | Obsolete | Obsolete | Active (mature) |
اہم امتیازی خصوصیات
- Integrated CAN 2.0B peripheral (بمقابلہPIC18F458-I/PT)
- OTP code stability for legacy systems (بمقابلہPIC18F8525-I/PT)
- Identical TQFP-80 pinout across the PIC18C858 family (بمقابلہPIC18C658T-I/PT)
ڈیزائن نوٹس
PIC18C858T-I/PT uses One-Time Programmable (OTP) EPROM, NOT flash. Firmware cannot be reprogrammed in-circuit or in production after programming. Always validate firmware with a windowed or flash prototype part (PIC18F8525 recommended) before committing to OTP production. Once blown, a faulty OTP part must be physically replaced, which is costly in fielded equipment.
Estimated: the PIC18C858T-I/PT core draws ~15-30 mA typical at 40 MHz with 5V supply, so a 5V LDO with at least 100 mA headroom is recommended (e.g., MCP1700 at 250 mA). Decouple VDD with 100 nF ceramic + 10 uF bulk placed within 5 mm of the supply pins (11 and 32 per datasheet). For CAN bus designs, isolate digital and analog grounds with a single-point connection to avoid ground-loop noise on ADC channels.
The 80-pin TQFP has a 0.5 mm pitch and gull-wing leads - design PCB pads per Microchip's TQFP-80 land pattern with adequate thermal relief. Place the decoupling capacitor array (100 nF + 10 uF) as close as possible to pins 11/32. Keep the crystal/oscillator traces short and guarded with a ground ring to minimize EMI. For CAN bus applications, route CANH/CANL as a differential pair with 120 ohm characteristic impedance per ISO 11898.
تعمیل کی معلومات
PIC18C858T-I/PT predates full RoHS transition in many Microchip OTP families. RoHS/REACH status not explicitly confirmed in retrieved distributor data; consult Microchip's product page or contact support for verification before use in RoHS-compliant designs.
